microsoft.netmeeting.txt

`Date: Tue, 4 May 1999 13:12:09 -0300  
From: Wanderley J. Abreu Junior <[email protected]>  
To: [email protected]  
Subject: Microsoft Netmeeting Hole  
  
Since I hadn't any response from Microsoft and a formal  
response from CERT i'm putting it here hopping for a helping hand on this  
problem.  
  
  
Version 1.0  
October 1996  
CERT(sm) Coordination Center  
Product Vulnerability Reporting Form  
  
If you know of a vulnerability in a product, please complete  
this form and return it to [email protected]. We aren't able to  
acknowledge each report we receive; however, if we have additional  
questions, we will contact you for further information.  
  
We prefer that any vulnerability information you  
send to us be encrypted. We can support a shared DES  
key or PGP. Contact the CERT staff for more information.  
The CERT PGP public key is available in  
  
ftp://info.cert.org/pub/CERT_PGP.key  
  
Thanks, we appreciate your taking the time to report this  
vulnerability.  
  
Please describe the vulnerability.  
- ---------------------------------  
  
What is the impact of this vulnerability?  
- ----------------------------------------  
(For example: local user can gain root/privileged access, intruders  
can create root-owned files, denial of service attack, etc.)  
  
a) What is the specific impact: Users running MS NetMeeting Version 2.1  
(The one that comes  
with windows 98) software in a conference can copy/paste the remote  
clipboard area.  
  
b) How would you envision it being used in an attack scenario:  
With the chat windows OPENED just do a CTRL-C in the box where you  
write with nothing in your box and nothing selected at all. then, you  
can get  
the entire clipboard from the other user in the conference, of  
course,  
if there's something in his Clipboard (ASCII, Bin, etc).  
  
  
To your knowledge is the vulnerability currently being exploited?  
- ----------------------------------------------------------------  
[no]  
  
If there is an exploitation script available, please include it here.  
- --------------------------------------------------------------------  
  
Do you know what systems and/or configurations are vulnerable?  
- -------------------------------------------------------------  
[yes] (If yes, please list them below)  
  
System : Windows 95, 98 and NT  
OS version : All Versions  
Verified/Guessed: Guessed  
  
Are you aware of any workarounds and/or fixes for this vulnerability?  
- --------------------------------------------------------------------  
[yes] (If you have a workaround or are aware of patches  
please include the information here.)  
  
I'm using PGP to encrypt the clipboard area.  
  
OTHER INFORMATION  
===========================================================================  
Is there anything else you would like to tell us? Please, send me some  
feedback abou this bug  
i'm working on a solution but seems NetMeeting to use some sort of Common  
Clipboard to build all  
the share enviroments. If you ever heard abou this bug, please also let me  
know. Thank you.  
  
  
Best Regards,  
Wanderley Junior  
  
`